Full Range Electrostatic Transducer

The essence of electrostatic design culminates in the MartinLogan CLS.

Our award winning Curvilinear Line Source™ technology allows smooth unencumbered dispersion of sound throughout the listening area. The result, perfectly etched imaging and focus are achieved through minimal room interaction and optimum natural reproduction of sound. For thirty years, electrostatic technology has been accepted as the ultimate for resolution and clarity in sound reproduction. MartinLogan has developed the fist practical application of this technology (patent pending) into a system that delivers full level response from a single transducer, operates reliably in open air use, is compatible with any system, and presents seamless dispersion of precise sound to your listening environments.

Launched in 1986

Price when discontinued:




Specifications are subject to change without notice

Frequency Response

45–19,000 Hz +2db,-3dB

Recommended Amplifier Power

20—320 watts per channel

Horizontal Dispersion


Vertical Dispersion

48" (121.92cm) line source


85 db watt/meter


Nominal: 6 Ohms
Minimum: 2 Ohms Compatible with 4, 6, or 8 Ohm rated amplifiers.

High Frequency Transducer

48" (121.92cm) CLS™ electrostatic transducer


Single-wire binding psots


55 lbs. (25 kg)


60" x 28" x 36 "
(152.4cm x 71.1cm x 91.4cm)

Customer Reviews For CLS

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Miroslav Swigon

  • Thursday, November 5, 2015

Amazing technology and timeless design!
Very transparent, rich, musical, natural, detail and surround sound. Midrange quality not available for normal dynamic speakers. Fantastic stereo channels communication. Deep music scene. At the same time the extraordinary closeness and natural vocals. Beautifully sounding single instruments like harmonica, trumpet, accordion and percussion. Unfortunately, insufficient low pressure and articulation of mid bass and low bass. You can get used to this, but it's worth to use a two high-end active subwoofers 12" or 15" with adjustable x-overs for full audiophile satisfaction. Best for vocal, jazz, classical and electronic music. Good productions sounds very good but bad sounds very bad or terrible. CLS is the ultimate judge for CD and LP quality productions and for your system quality like source and amplifier. Must to drive good solid state and stable amplifier like ASR Emitter or vintage Nakamichi. Need lots of power! Minimum 200W per channel! Beware they have very low impedance in area of 1 - 1,5 ohms. Warning easy to overdrive! Not for maniacs and cranks! Loudspeakers not for everyone. Only for sensitive listeners. Must have one pair in good condition. Life is too short. Happy listening and good luck!

Kjetil Fekjaer

  • Wednesday, October 26, 2011

Fantastic sound
Not much more to say but FANTASTIC!! Heard it for the first time yesterday, better late than never:-))